Step Back History
How a Pill Changed History
Today we’re going to explore the most important invention of the 20th century. Despite its size, it’s incredible how much it liberated our daily lives. I am of course talking about the birth control pill.
Science ABC
Why Bombs Make a Whistling Sound When They Fall Through the Air
You may have noticed in movies and tv shows that when a bomb falls through the sky, it makes a whistling sound. This has to do with the fighter planes and bomber planes of world war 2. During the second world war, German air force...
Science ABC
What is the Heisenberg Uncertainty Principle: Explained in Simple Words
Heisenbergs uncertainty principle says that if we know everything about where a particle is located, we know nothing about its momentum. Conversely, if we know everything about its momentum, then we know nothing about where the particle...
Curated Video
Wavelength
The distance between corresponding points on two successive waves, and therefore the length of a complete cycle of a wave. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Curated Video
Echo
The reflection of a sound wave back to a listener, so it is is heard again after the original noise. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Shockwaves: Sudden Pressure Waves
A large amplitude compression wave, associated with a sharp change in pressure, temperature and density. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Amplitude
In the study of waves, amplitude is the maximum displacement of a wave from its rest position. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
Curated Video
S-wave
One of two types of seismic wave produced in an earthquake. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
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Mechanical wave
A mechanical wave is one that is carried by vibrations in a physical medium, and which therefore requires a medium in which to propagate. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
Curated Video
Renewable energy
Energy from natural resources that replenish or renew themselves, or we can consider inexhaustible, such as sunlight, wind, tidal and wave power. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using...
Curated Video
Sustainable
A sustainable process is one that can be continued without damaging the environment or exhausting natural resources in the long term. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...
Curated Video
P-wave
A fast-moving seismic wave produced by an earthquake. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract...
Curated Video
Longitudinal wave
A waveform in which the vibrations of the medium it is propagated through are in the same direction as the wave's travel. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Curated Video
Doppler Shift: Frequency and Motion
A change in the observed frequency of a wave when it is emitted from a moving object and observed from a stationary point, or vice versa. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images...
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Electromagnetic radiation
A wave with both magnetic and electrical field components, which oscillate perpendicular to each other. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
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Refraction
The change in direction of a wave caused by its change in velocity, as it moves from one medium into another. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Resonance: How Sound Changes Across Different Mediums
Sounds can change as they move from one medium to another. Under the right circumstances the effect is surprising and extreme. Physics - Waves - Learning Points. Sound is a wave that is created by vibrating objects. Every object has a...
Curated Video
Coastal Processes: Waves
Coastal features around the world vary hugely. How do waves contribute to shaping coastlines? Earth Science - Geology - Learning Points. Waves are created by wind. Waves vary in size and strength. Waves break in shallow water....
Curated Video
Marine Renewables
Wave and tidal power are a developing form of renewable energy. How do they work and what makes them desirable alternatives to other forms of renewable energy? Earth Science - Earth's Resources - Learning Points. The Atlantic Ocean and...
Curated Video
Freak Waves
Why scientists dispelled rumours of extreme waves at sea, based on flawed mathematics. Maths - Statistics And Probability A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract...
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Hydropower
How dams, tidal power and wave power work to generate electricity. What are the pros and cons? Earth Science - Earth's Resources - Learning Points. Hydropower uses the power of moving water as a source of energy. Dams, tidal power and...
Curated Video
Predicting Volcanic Eruptions
Learn how scientists can predict volcanic activity using seismology to monitor lava patterns deep underground. Earth Science - Geology - Learning Points. Scientists use seismology to predict an eruption. A "long-period event" involves...
Curated Video
How Do Fireworks Work?
Fireworks combine chemical processes, from combustion to spectroscopy, to create spectacular displays. Discover what happens when the fuse is lit. Chemistry - Reactions - Learning Points. Fireworks involve combustion and exothermic...
Curated Video
What is Sound?
Sounds can vary greatly: extremely quiet or deafeningly loud, high and shrill to low and booming. Why are they so different? Physics - Waves - Learning Points. Sound is a vibration passed to and fro along particles forming a wave. It can...